What is the most authoritative definition of tourism?

The definition of tourism Lǐyóu[tour; Travel, trip day] Xinhua dictionary is defined as going out for sightseeing. The word comes from Latin "tornare" and Greek "tornos", which means "lathe or circle; The meaning of movement around a central point or axis has evolved into "order" in modern English. Suffix -—ism is defined as "an action or process; And the suffix -ist stands for "people who engage in specific activities". Root tour is connected by suffix-—ism and-—ist, which refers to the movement of circular trajectory, so tourism refers to the reciprocating travel, that is, the activity of returning to the starting point after leaving; People who complete this trip are also called tourists. In the dictionary of Webster University, tourism is: "Travel for the purpose of entertainment; An industry that provides journeys and services to tourists. " There are three different definitions of "tourism": ConceptualDefinition, which aims to provide a theoretical framework to determine the basic characteristics of tourism and distinguish it from other similar and sometimes related activities. Technical definition (techno 010 giaid finitjon): used to provide tourism information for statistics and legislation. The meanings or limitations provided by various definitions of tourism technology have been widely used at home and abroad. The latter method, that is, adopting technical definitions, helps to standardize the collection of comparable international tourism data. Theoretical definition: Tourism is the sum total of all relationships and phenomena that occur during people's irregular travel and sightseeing in order to seek spiritual pleasure. Remarks: The definition of tourism in the tourism industry, whether at home or abroad, is not a very accurate and unified definition, and each has its own views. With the expansion of tourism scale and the rise of tourism industry, there are different understandings of the meaning of tourism, so technical definitions expressed in different contents and ways abound. It is generally believed in China that tourism is a temporary way of life in different places in modern society, with the characteristics of enjoyment and amateur.